STMPE2403 datasheet(34/63 Pages) STMICROELECTRONICS

No de pièce	STMPE2403

Description	24-bit Enhanced port expander with Keypad and PWM controller Xpander logic

PDF	63 Pages

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Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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34 / 63 page

GPIO controller

STMPE2403

34/63

The function of each bit is shown in the following table:

Table 33. Bit function

Function

GPIO Monitor Pin State

Reading this bit yields the current state of the bit. Writing has no

effect.

GPIO Set Pin State

Writing ‘1’ to this bit causes the corresponding GPIO to go to ‘1’

state. Writing ‘0’ has no effect.

GPIO Clear Pin State

Writing ‘1’ to this bit causes the corresponding GPIO to go to ‘0’

state. Writing ‘0’ has no effect.

GPIO Set Pin Direction

‘0’ sets the corresponding GPIO to input state, and ‘1’ sets it to

output state

GPIO Edge Detect Status

Set to ‘1’ by hardware when there is a rising/falling edge on the

corresponding GPIO. Writing ‘1’ clears the bit. Writing ‘0’ has no

effect.

GPIO Rising Edge

Set to ‘1’ to enable rising edge detection on the corresponding

GPIO.

GPIO Falling Edge

Set to ‘1’ to enable falling edge detection on the corresponding

GPIO.

GPIO Pull Up

Set to ‘1’ to enable internal pull-up resistor

GPIO Pull Down

Set to ‘1’ to enable internal pull-down resistor

STMPE2403 Fiches technique(PDF) 34 Page - STMicroelectronics